The Normal Cultivable Microflora in Upper Jejunal Fluid in Healthy Adults

T. JustesenDept. of Clinical Bacteriology, Institute of Medical Microbiology, University of Copenhagen, and Dept. of Internal Medicine P, Division of Medical Gastroenterology, Rigshospitalet, University of Copenhagen, Copenhagen, Denmark

O. Haagen NielsenDept. of Clinical Bacteriology, Institute of Medical Microbiology, University of Copenhagen, and Dept. of Internal Medicine P, Division of Medical Gastroenterology, Rigshospitalet, University of Copenhagen, Copenhagen, Denmark

I. E. JacobsenDept. of Clinical Bacteriology, Institute of Medical Microbiology, University of Copenhagen, and Dept. of Internal Medicine P, Division of Medical Gastroenterology, Rigshospitalet, University of Copenhagen, Copenhagen, Denmark

J. LaveDept. of Clinical Bacteriology, Institute of Medical Microbiology, University of Copenhagen, and Dept. of Internal Medicine P, Division of Medical Gastroenterology, Rigshospitalet, University of Copenhagen, Copenhagen, Denmark

S. Nørby RasmussenDept. of Clinical Bacteriology, Institute of Medical Microbiology, University of Copenhagen, and Dept. of Internal Medicine P, Division of Medical Gastroenterology, Rigshospitalet, University of Copenhagen, Copenhagen, Denmark

Abstract

Bacteriological studies of uncontaminated upper jejunal fluid were performed in 85 normal subjects. Fifty-three per cent of the samples were sterile (<10¹ CFU/ml). In 10% of the cases the total number of microorganisms exceeded 10⁵ CFU/ml. The main groups of microorganisms isolated were Streptococcus sp (‘Viridans group’), Lactobacillus sp., Veillonella parvula, Actinomyces sp., Haemophilus sp., Corynebacterium sp., and Candida albicans, each found in more than 10% of the subjects. Only the Streptococcus sp. exceeded 10⁵ CFU/ml, and enterobacteria were found in 5% of the subjects, the number not exceeding 10³ CFU/ml. No other typical members of the lower gastrointestinal tract were isolated. The number of subjects harbouring bacteria and the distribution of bacterial species were the same in both sexes and in different age groups.

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The Normal Cultivable Microflora in Upper Jejunal Fluid in Healthy Adults

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